14k Gold Plated with Blue Sapphire Cubic Zirconia Radiant Blue Enamel Halo Stud Earrings. Celebrate your next holiday, anniversary, or birthday by gifting these stunning 14k gold-plated stud earrings to a loved one. Radiant cut deep sapphire blue cubic zirconias (September Birthstone) secured in four-prong settings offset the blue enamel frame halo. Butterfly backs keep these vibrant studs secure, perfect for adding a colorful, shiny touch to your casual, work, or nightwear.Measurement 11mm